Third point support shoe



Jan. 7, 1936. E. G. BUSSE ET AL THIRD POINT SUPPORT SHOE Filed Dec. 3, 1934 Ml INN" I/v VENTO E5 E/mn 305.56.

Patented Jan. 7, 1936 UNITED STATES PATENT OFFIC Application December 3, 1934, Serial No. 755,686

16 Claims.

This invention relates to brake equipment for railway vehicles andconsists in a novel third point supporting chair for brake beams.

'Where it is desired to support a truss type ;.5 brake beam at the center, that is provide the so=called third point auxiliary support, a shoe or chair is ordinarily attached to special ears or lugs. on the front end of the strut, which shoe for chair rests upon and is adapted to slide along a suitably inclined supporting strap carried by theispring plank or other convenient part of the truck. Reference is made to Williams Patent 997,888 for an early disclosureof this type of third point brake beam support.

Many brake. beams in service do not have struts with the special lugs orcars, and where one of these is substituted for a beam having the third pointsupport attaching elements, the oldchair cannot be replaced and thethird point support is, in most cases, not replaced.

A form of third point support chair which does not require a special strut has been suggested, but: this chair utilizes metal straps which must be bent in application to the beam. After one 01 1 at the most, several applications, the straps break and the chair must be discarded.

One object of the present invention is to prowide-a third point support chair which may be readily applied to a beam not providedwith a i1 ial strut.

Another objectof theinvention is to provide a; brake beam third point support chair which may be repeatedly detached and replaced without injuring the chair.

- Another object, is to provide a third point suport chair which does not require special lugs or ears. for at achin th same. to a beam, b may be attached to a variety of different types of; beam c d na, necessary, beams having the special lugs or ears.

Thes o cts and others are attained by th structures illustrated in the accompanying drawin which Figure 1 is a top view illustrating parts of a :truck and truss type brake beam embodying the ii nvfientim i Figure 2 ,islavertical longitudinal section and side view illustrating the same.

Figures 3 and it illustrate in iperspectiveen- ,larged details of thethird point support chair wileyicetshown in Figures. 1 and 2.

' Figurebis a partial top view similar to Figure A; but showing .a'modified-iorm of ;chair and beam (Cl. 188. Z1 3) Figure 6 is an enlarged perspective view of the chair in Figure 5.

Figures 7 and 8 are partial top and side views,

respectively, corresponding to. Figures 1 and 2 and showing the third point support chairin Figures 1 and 2 applied to a beam having a dilferent typeof strut.

In Figures 1 and 2 is illustrated a part or a truck spring plank I, to which is attached a.

third point supporting strap 2 by means of a 10 bracket3 riveted to the spring plank as at 4. Carried above the strap 2 by means of the usual brake hangers 5 is a truss type brake beam including channel compression member 6, tension member I, and strut 8 having the usual slot 9 and pin holes 9w for pivotal attachment to the brake lever (not shown) and a loop 8a surrounding the tension member 1. At the ends or lateral extremities of the beam are the usual brake heads A and shoes B. The support strap 2 has a longitudinally and upwardly inclined extremity upon which slidably rests the shoe portion I 8 of a third point support chair secured to the beam at theintersection of the strut and tension member.

The support chair, as most clearly illustrated in Figure 3 includes a broad slightly curved shoe portion l0 and arms [I at each side terminating in jaws I2, IZa, I3, and l'3d for receiving the tension member I. Connecting the under jaws I2a, and I3a. is a depressed bar I4.

The chair is secured to the beam, as indicated in Figures 1 and 2, by means of a U-bolt t5 which extends over the strut 8 and through apertures I6 in the jaws I2, IZa, I3, and [3a and is maintained therein by lock nuts ll. The bolt is drawn down upon the top of the strut and the bottom of the strut rests within the depressedportion of the bar I4. The vertical portions I 8 of the bar provide abutments mnemately adjacent the sides of the strut for preventing lateral movement of the chairrelative to" the beam and maintaining the same properly centered in the horizontal plane. Due to the opposite inclination of the portions of the-tension member I held within the jaws t2, I-Za, I 3, and lid, and the bar I4 and-U-bolt I5, the chair is prevented from tilting vertically. The chair is thus immovably secured to the beam.

The type of chair in Figures 1, 2, and 3 is universal and maybe applied, as shown in Figures "7 and 8, to a beam having a strut t9 with special lugs or ears 20 iorpi-votal attachmentof the old type .of third point support chair. The universalschair .does. not "utilize. the ears 120,.- but e0 .strut and a tension member, and a third point support chair including structure engaging said tension member sidewardly of said strut and these ears do not interfere with the application of the chair.

In Figures 5 and 6 is shown another form of universal third point support chair app-lied to a beam having a strut 3% with upwardly projecting ears or lugs 3| for attachment to an overhead third point suspension. The modified chair includes a broad shoe portion 2! for slidably resting upon the support strap 22 and a single arm 23'with bifurcations 2 3 terminating in the jaws 25, 25a, 26 and 26a. which snugly embrace the tension member 21 and are held immovably attached thereto by the U,-bolt 28. The bottom of the strut rests against the de pressed bar 29, as in Figures 1 and 2. The modified chair may also be applied to beams having struts with forwardly projecting ears, as in Figures '7 and 8, or loops encircling the tension member as in Figures 1 and 2. I

In each of the forms, the chair may be easily {and firmly clamped to truss type beams with or without special struts and irrespective of strut structure which extends beyond, above, or

below the tension member. Also the chair may be repeatedly detached from and reapplied to the beam without injuring the metal thereof as is the case where straps must be bent about the tension member and strut. Both forms of the chair may be properly applied to beams having substantially any type of strut. Since, in case the diameter of the tension member is less than the space between the chair jaws, the U-bolt will. draw the bottom jaws tightly against the under surface of the tension member, the size of the tension member may be substantially varied without affecting the rigid assembly of either of the chairs with the beam. Where the tension member snugly fits the space between the chair jaws, the chair may be rigidly secured in position on the beam by a pair of pins extending through the apertures in each pair of jaws independently of the strut, instead of the U-bolt which clamps around the strut. s The invention is not limited to the exact details illustrated in the figures, and various modifications may be made and the exclusive use of .all such modifications as comewithin the scope of the appended claims is contemplated.

, What is claimed is:

1. In combination, a brake beam including a strut and a tension member, a brake beam guard,

'guide, or support member, and a third point support chair including structure extending on each side of said strut and an intermediate shoe slidable on said guard, guide, or support member but unrestricted thereby in its lateral movement,

said structure including a separately formed vmovable element for clamping the chair to said tension member.

'2. In combination, a brake beam including a separately formed means for securing said structure to said tension member.

3. In combination, a brake beam including a tension member and a strut, and a third point support chair including jaws embracing said tension member on each side of said strut and separately formed structure 'for securing said jaws to said tension member and independently support chair including separately formed parts immovably secured to said tension member on each side of said strut and abutments at each side of said strut for engaging the same to maintain the chair properly centered.

5. In combination, a brake beam including a strut and a tension member, and a third point support chair including parts secured to said tension member on each side of said strut, a member connecting said parts and extending beneath said strut, and a separately movable element connecting said parts and extending oversaid strut, said parts, member, and element maintaining said, chair rigidly secured to said beam.

6. Structure as specified in claim 5 in which said movable element is in the form of a U- bolt.

7. A brake beam third point support chair having laterally spaced jaws for receiving the tension member of a brake beam and structure for extending around the beam strut, said structure including separately formed means for clamping the chair to the strut. and tension member.

8. A brake beam third point support chair having laterally spaced elements for engaging the tension member of a brake beam, and separately formed means for firmly securing said elements to the tension member, in which space is provided between said spaced elements to accommodate a partof the beam strut extending beyond said tension member.

9. In a brake beam third point support chair, a part for slidably engaging a brake beam guard, guide, or support member, elements for embracing the tension member of the beam at the sides of said part, and independently operable means for clamping said elements to the tension member.

10. A brake beam third point support chair comprising a shoe portion for slidably engaging I a guard, guide, or support member, an arm extending upwardly from said chair and bifur- 12. In combination, a brake beam including a tension member and a strut, and a third point support chair including elements associated with said tension member and structure clamped to said strut and including a separately formed movable part. 7

13. In combination, a brake beam including a tension member and a strut, and a third point support chair including elements located on each side of said strut and extending beyond said tension member and a U-bolt extending across said strut and cooperating with said elements so as to tightly draw the same against said tension member.

14. Structure as specified in claim 13 in which said elements are in the form of vertically spaced jaws embracing said tension member on each side of said strut, said U-bolt functioning to .draw'corresponding jaws against said tension member whereby said chair may be rigidly assembled with beams having tension members of various sizes.

15. In combination, a brake beam including a tension member and a strut, and a third point support chair including a portion for engaging the under side of said tension member, a relatively movable part engaging the upper side of said strut, and means for clamping said portion and part against said tension member and strut.

16. A brake beam third point support chair comprising a shoe portion for engaging a guard, guide, or support member, a part extending therefrom to seat against the lower face of a brake beam tension member at opposite sides of the brake beam strut, a separate and removable part for overlying and straddling the strut, and means for drawing said parts together.

EDWIN G. BUSSE. HERBERT W. EKHOLM. 

